Create combo_box.c

controls/combo_box.c

@@ -0,0 +1,87 @@
+#include <windows.h>
+
+LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
+
+HINSTANCE g_hinst;
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
+                    PWSTR lpCmdLine, int nCmdShow) {
+
+    HWND hwnd;
+    MSG  msg ;    
+    WNDCLASSW wc = {0};
+    wc.lpszClassName = L"Application";
+    wc.hInstance     = hInstance ;
+    wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
+    wc.lpfnWndProc   = WndProc ;
+    wc.hCursor       = LoadCursor(0,IDC_ARROW);
+
+    g_hinst = hInstance;
+  
+    RegisterClassW(&wc);
+    hwnd = CreateWindowW(wc.lpszClassName, L"Combo box",
+                  WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+                  100, 100, 270, 170, 0, 0, hInstance, 0);  
+
+
+    while (GetMessage(&msg, NULL, 0, 0)) {
+    
+        DispatchMessage(&msg);
+    }
+
+    return (int) msg.wParam;
+}
+
+LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, 
+        WPARAM wParam, LPARAM lParam) {
+
+    static HWND hwndCombo, hwndStatic;
+    const wchar_t *items[] = { L"FreeBSD", L"OpenBSD", 
+        L"NetBSD", L"Solaris", L"Arch" };
+
+    switch(msg) {
+    
+        case WM_CREATE:
+        
+              hwndCombo = CreateWindowW(L"Combobox", NULL, 
+                    WS_CHILD | WS_VISIBLE | CBS_DROPDOWN,
+                    10, 10, 120, 110, hwnd, NULL, g_hinst, NULL);   
+
+              CreateWindowW(L"Button", L"Drop down", 
+                    WS_CHILD | WS_VISIBLE,
+                    150, 10, 90, 25, hwnd, (HMENU) 1, g_hinst, NULL); 
+
+              hwndStatic = CreateWindowW(L"Static", L"", 
+                    WS_CHILD | WS_VISIBLE,
+                    150, 80, 90, 25, hwnd, NULL, g_hinst, NULL); 
+
+              for (int i = 0; i < 4; i++ ) {
+              
+                  SendMessageW(hwndCombo, CB_ADDSTRING, 0, (LPARAM) items[i]);
+              }
+
+              break;
+
+        case WM_COMMAND:
+        
+             if (HIWORD(wParam) == BN_CLICKED) {
+             
+                  SendMessage(hwndCombo, CB_SHOWDROPDOWN, (WPARAM) TRUE, 0);
+             }
+             
+             if (HIWORD(wParam) == CBN_SELCHANGE) {      
+             
+                  LRESULT sel = SendMessage(hwndCombo, CB_GETCURSEL, 0, 0);
+                  SetWindowTextW(hwndStatic, items[sel]);
+                  SetFocus(hwnd);
+             }
+             break;
+
+        case WM_DESTROY:
+        
+            PostQuitMessage(0);
+            break; 
+    }
+  
+    return DefWindowProcW(hwnd, msg, wParam, lParam);
+}